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Composition of Inventories, Net (Detail) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Inventory [Line Items]    
Raw material $ 94,862 $ 89,365
Work-in-process 29,725 31,014
Finished goods 36,755 33,162
Inventories, net $ 161,342 $ 153,541